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Code :R7410408 IV B.Tech I Semester(R07)Regular Examinations, November/December 2010 DIGITAL IMAGE PROCESSING (Electronics & Communication Engineering)

Time: 3 hours

Max Marks: 80 Answer any FIVE questions All questions carry equal marks ?????

1. (a) What is meant by Digital Image processing and Digital Image representation - Explain. (b) Explain the concept of grey levels and how is to it helpful is image representation. 2. (a) Explain the term convolution and correlation with sample and with mathematical expressions. (b) Explain the importance of convolution in frequency domain analysis. 3. (a) How grey level transformation function are used for contrast enchancement - Explain. (b) Explain briefly about point spread function. 4. (a) Explain briefly with block diagram about homomorphic filtering approach for image processing. (b) What is meant by smoothing filter- Explain. 5. (a) Briefly explain RGB colour model and its importance in color images. (b) What is meant by Pseudo-colour image processing? 6. (a) What is Discrete formulation and circulate matrix- Explain (b) Explain Interactive restorations approach used for image restorations. 7. (a) What is thresholidng explain briefly about and multilevel thresholidng. (b) Explain the concept of gradient operation used in connection with image segmentation? 8. (a) Explain a lossy predictive coding model of encodes and decodes. (b) What is coding redundancy and inter pixel dedundancy. ?????

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Code :R7410408 IV B.Tech I Semester(R07)Regular Examinations, November/December 2010 DIGITAL IMAGE PROCESSING (Electronics & Communication Engineering)

Time: 3 hours

Max Marks: 80 Answer any FIVE questions All questions carry equal marks ?????

1. (a) Distinguish between grey image and colour images what is the necessity to convert grey level to binary conversion. (b) Briefly explain about Image Geometry and Pixel of an image 2. (a) What are 2-D function briefly explain. (b) What is meant by successive doubling FFT algorithm? 3. (a) Explain briefly about special domain methods for enhancement of image. (b) What is meant by contrast stretching intemity transformation - Explain. 4. (a) What is a low pass filter? How it can be used for enhancement & what are its draw backs and how they will be overcome? (b) Explain the characteristics of colour image - Explain. 5. (a) Explain the filtering functional model for pseudo colour image processing. (b) What is the importance of band reject files in image enhancement - Explain with mathematical relation. 6. (a) What is wraparound error and how do you use constrained least squares restoration. (b) Explain briefly about algebric approach to restoration. 7. (a) What is meant by Image segmentation explain briefly about line detection and point detection. (b) Briefly explain about Edge linking and boundary detection. 8. (a) Briefly explain error free compression using Huffman coding. (b) What are optical predictors and quantizaltion? Explain briefly about its importance. ?????

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Code :R7410408 IV B.Tech I Semester(R07)Regular Examinations, November/December 2010 DIGITAL IMAGE PROCESSING (Electronics & Communication Engineering)

Time: 3 hours

Max Marks: 80 Answer any FIVE questions All questions carry equal marks ?????

1. (a) What is a pixel and establish a relationship between pixels . (b) What is a scanner and explain the purpose of a digital camara and camara calibration. 2. (a) Consider a simple function of a rectangular cube and derive its fourier transform. (b) Explain the term separability and translations in connection with Discreate fourier Transform. 3. (a) What is meant by immensity level slicing? Explain. (b) Explain the term histogram processing and Histogram equalization. 4. (a) Explain how high pass filters are used for image enhancement and what are the draw backs and how it will be overcome. (b) Explain briefly about colour models often used in image processing. 5. (a) What is meant by intensity slicing - Explain. (b) Explain briefly with Block diagram Pseudo colour image processing. 6. (a) What is degradation model? Explain the property of homogeneity. (b) Briefly explain the approach of inverse filtering method used for image restoration. 7. (a) Briefly explain about edge detection by derivative operators. (b) Briefly explain designed procedures for boundary detection of an image. 8. (a) What is meant by Bandwidth compression and explain data redundancy. (b) Explain briefly about source encodes and decodes functional models. ?????

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Code :R7410408 IV B.Tech I Semester(R07)Regular Examinations, November/December 2010 DIGITAL IMAGE PROCESSING (Electronics & Communication Engineering)

Time: 3 hours

Max Marks: 80 Answer any FIVE questions All questions carry equal marks ?????

1. (a) Distinguish between gray scale image and Indexed images. (b) Explain briefly about sampling and quantization ? Explain uniform and Non uniform sampling. 2. (a) Explain the term periodicity and conjugate symmetry and rotation. (b) Explain briefly about finite sampling concepts with illustrations. 3. (a) What is meant by enhancement of an image by point processing - Explain (b) What is the necessity for compression and explain logarithm transformation function. 4. (a) Explain briefly about Image processed by Butterworth low pass and high pass filters and also explain the draw backs of Image enhancement. (b) What is meant by homomorphic filtering - Explain. 5. (a) Explain HSI colour triangle model generally used with colour images. (b) Explain the conversion procedure from HSI to RGB model 6. (a) What is meant by constrained and unconstrained restoration (b) What is least squares restoration procedure explain. 7. (a) Briefly explain simple global thresholidng and optimal thresholidng in connection with image segmentation and detection. (b) What is the role of Laplacian 2-D function in image segmentation. 8. (a) What is meant by code redundancy- Explain. (b) Explain how channel encodes and decodes play an important role in over all encoding and decoding process. ?????